Added and/or, cond, select, block local args.
Added raymarching example.
Updated raymarcher.
Added struct support.
Fixed define order.  Switched raymarch over to material struct.
Added shameless plug to shadertoy output.
Switched to new choose word for materials and switched to hit struct.
Added take word to pull elements from deep on the stack.  Added storage class for macro and block args.
Cleaned up and optimized raymarcher.
Mixed up the scene a bit.
Renamed some shader stuff.
Added variable renaming.
Added precedence logic for removal of extraneous parentheses.
Added shader minimization
Added mouse support to raymarcher.  Optimized rendering.
Added minimize mode; added word argument carry-over.
Added runtime arrays
Updated raymarcher.
Added initial Shaderforth Live compiler.